Abstract:
A method for manufacture of lamp bulbs wherein four wires are arranged in parallel with and spaced apart by a suitable distance from each other and supported by a plurality of glass beads which are melted when the wires are attached. Two inner wires of the four wires are cut off at predetermined points and bent at cutout ends whereby lead and anchor wires are provided whereas the two outer wires are bent to form frame wires, whereby a filament-supporting assembly is provided; thereafter filaments are supported between the lead wires of the filament supporting assembly and engaged with the anchor wire; the filament-supporting assembly with the filaments supported thereon is placed into a glass envelope; the envelope is evacuated and sealed; and a base is attached to the envelope.
Abstract:
In a method of manufacturing a tube assembly for electric lamps in which a central supporting wire is supplied for the helical filament wire, according to the invention the supply of the supporting wire takes place via the exhaust tube.
Abstract:
According to one embodiment, an incandescent lamp includes: a bulb; a pair of lead sections that have respectively a holding section including nickel or molybdenum as a main component and an introduction section that is joined to one end portion of the holding section and is formed of Dumet wire; a filament section that is held between end portions of a pair of holding sections opposite to a side on which the introduction sections are joined inside the bulb; a fixing member that holds a pair of introduction sections inside the bulb; and a sealing section that seals one end portion of the bulb and holds the pair of introduction sections.
Abstract:
An incandescent halogen lamp used in connection with a vehicle headlamp system in which stray light attributable to reflection off of internal lamp components is reduced while the structural integrity of the lamp is maintained. The halogen lamp includes two filaments, several lead wires, and a support bridge all sealed within a glass envelope. Each filament is connected at its outermost end to a flattened end portion of a lead wire which extends along the length of the filament from near the support bridge to the upper end of the filament. The flattened outer ends of the lead wires have a narrow profile that is in alignment with the direction of illumination of light from their respective filaments. This arrangement reduces the surface area that could otherwise interfere with light emitted by the filaments, and thereby reduces the overall stray light produced by the lamp. The flattened outer ends can have a roughened surface to further help reduce the amount of light reflected off the lead wires.
Abstract:
An infrared thermal lamp, which has a filament mounted to the lower end of a support rod downwardly extending from a stem of a base, is disclosed. The infrared thermal lamp includes an insulating plate having an anchoring slot at the center for receiving the lower end of the support rod in a semi-melted state. Thus, the insulating plate is fixedly mounted to the support rod, and the anchoring slot is opened at the top end and is closed at the bottom end and has an enlarged diameter at the bottom end, thereby improving productivity, saving labor, automating the mounting process of the insulating plate, and reducing production cost.
Abstract:
The electric lamp for series arrangement comprises at least one current-supply wire of nickel wire, copper wire or copper cladded wire. A shortcircuit switch is provided, which consists of a vitreous mass, in which copper powder is dispersed and which is fused with the current-supply wires, and of an oxide skin, which is present on the said current-supply wire at the sealing-in area in the mass. The vitreous mass is electrically conducting. An electrical connection between the current-supply wires is not obtained, however, until the filament burns through and the oxide skin breaks down due to the overvoltage then occurring.